ath10k: add debugfs support to dump per sta tx stats

This patch adds 'tx_stats' in per station debugfs entry.

Use this command to dump tx_stats:
cat /sys/kernel/debug/ieee80211/phy0/netdev\:wlan0/
    stations/<MACADDR>/tx_stats

Signed-off-by: Anilkumar Kolli <akolli@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ath/ath10k/debugfs_sta.c b/drivers/net/wireless/ath/ath10k/debugfs_sta.c
index a63c97e..929f2f6 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/debugfs_sta.c
+++ b/drivers/net/wireless/ath/ath10k/debugfs_sta.c
@@ -626,9 +626,105 @@ static const struct file_operations fops_tid_stats_dump = {
        .llseek = default_llseek,
 };
 
+static ssize_t ath10k_dbg_sta_dump_tx_stats(struct file *file,
+                                           char __user *user_buf,
+                                           size_t count, loff_t *ppos)
+{
+       struct ieee80211_sta *sta = file->private_data;
+       struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
+       struct ath10k *ar = arsta->arvif->ar;
+       struct ath10k_htt_data_stats *stats;
+       const char *str_name[ATH10K_STATS_TYPE_MAX] = {"succ", "fail",
+                                                      "retry", "ampdu"};
+       const char *str[ATH10K_COUNTER_TYPE_MAX] = {"bytes", "packets"};
+       int len = 0, i, j, k, retval = 0;
+       const int size = 2 * 4096;
+       char *buf;
+
+       buf = kzalloc(size, GFP_KERNEL);
+       if (!buf)
+               return -ENOMEM;
+
+       mutex_lock(&ar->conf_mutex);
+
+       spin_lock_bh(&ar->data_lock);
+       for (k = 0; k < ATH10K_STATS_TYPE_MAX; k++) {
+               for (j = 0; j < ATH10K_COUNTER_TYPE_MAX; j++) {
+                       stats = &arsta->tx_stats->stats[k];
+                       len += scnprintf(buf + len, size - len, "%s_%s\n",
+                                        str_name[k],
+                                        str[j]);
+                       len += scnprintf(buf + len, size - len,
+                                        " VHT MCS %s\n",
+                                        str[j]);
+                       for (i = 0; i < ATH10K_VHT_MCS_NUM; i++)
+                               len += scnprintf(buf + len, size - len,
+                                                "  %llu ",
+                                                stats->vht[j][i]);
+                       len += scnprintf(buf + len, size - len, "\n");
+                       len += scnprintf(buf + len, size - len, " HT MCS %s\n",
+                                        str[j]);
+                       for (i = 0; i < ATH10K_HT_MCS_NUM; i++)
+                               len += scnprintf(buf + len, size - len,
+                                                "  %llu ", stats->ht[j][i]);
+                       len += scnprintf(buf + len, size - len, "\n");
+                       len += scnprintf(buf + len, size - len,
+                                       " BW %s (20,40,80,160 MHz)\n", str[j]);
+                       len += scnprintf(buf + len, size - len,
+                                        "  %llu %llu %llu %llu\n",
+                                        stats->bw[j][0], stats->bw[j][1],
+                                        stats->bw[j][2], stats->bw[j][3]);
+                       len += scnprintf(buf + len, size - len,
+                                        " NSS %s (1x1,2x2,3x3,4x4)\n", str[j]);
+                       len += scnprintf(buf + len, size - len,
+                                        "  %llu %llu %llu %llu\n",
+                                        stats->nss[j][0], stats->nss[j][1],
+                                        stats->nss[j][2], stats->nss[j][3]);
+                       len += scnprintf(buf + len, size - len,
+                                        " GI %s (LGI,SGI)\n",
+                                        str[j]);
+                       len += scnprintf(buf + len, size - len, "  %llu %llu\n",
+                                        stats->gi[j][0], stats->gi[j][1]);
+                       len += scnprintf(buf + len, size - len,
+                                        " legacy rate %s (1,2 ... Mbps)\n  ",
+                                        str[j]);
+                       for (i = 0; i < ATH10K_LEGACY_NUM; i++)
+                               len += scnprintf(buf + len, size - len, "%llu ",
+                                                stats->legacy[j][i]);
+                       len += scnprintf(buf + len, size - len, "\n");
+               }
+       }
+
+       len += scnprintf(buf + len, size - len,
+                        "\nTX duration\n %llu usecs\n",
+                        arsta->tx_stats->tx_duration);
+       len += scnprintf(buf + len, size - len,
+                       "BA fails\n %llu\n", arsta->tx_stats->ba_fails);
+       len += scnprintf(buf + len, size - len,
+                       "ack fails\n %llu\n", arsta->tx_stats->ack_fails);
+       spin_unlock_bh(&ar->data_lock);
+
+       if (len > size)
+               len = size;
+       retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+       kfree(buf);
+
+       mutex_unlock(&ar->conf_mutex);
+       return retval;
+}
+
+static const struct file_operations fops_tx_stats = {
+       .read = ath10k_dbg_sta_dump_tx_stats,
+       .open = simple_open,
+       .owner = THIS_MODULE,
+       .llseek = default_llseek,
+};
+
 void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                            struct ieee80211_sta *sta, struct dentry *dir)
 {
+       struct ath10k *ar = hw->priv;
+
        debugfs_create_file("aggr_mode", 0644, dir, sta, &fops_aggr_mode);
        debugfs_create_file("addba", 0200, dir, sta, &fops_addba);
        debugfs_create_file("addba_resp", 0200, dir, sta, &fops_addba_resp);
@@ -637,4 +733,9 @@ void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                            &fops_peer_debug_trigger);
        debugfs_create_file("dump_tid_stats", 0400, dir, sta,
                            &fops_tid_stats_dump);
+
+       if (ath10k_peer_stats_enabled(ar) &&
+           ath10k_debug_is_extd_tx_stats_enabled(ar))
+               debugfs_create_file("tx_stats", 0400, dir, sta,
+                                   &fops_tx_stats);
 }